125062821 has 12 divisors (see below), whose sum is σ = 194542348. Its totient is φ = 76961664.

The previous prime is 125062813. The next prime is 125062841. The reversal of 125062821 is 128260521.

It is a happy number.

125062821 is a `hidden beast` number, since 12 + 5 + 0 + 628 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27941796 + 97121025 = 5286^2 + 9855^2 .

It is not a de Polignac number, because 125062821 - 2³ = 125062813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125062811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 534340 + ... + 534573.

Almost surely, 2^125062821 is an apocalyptic number.

It is an amenable number.

125062821 is a deficient number, since it is larger than the sum of its proper divisors (69479527).

125062821 is a wasteful number, since it uses less digits than its factorization.

125062821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068932 (or 1068929 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 125062821 is about 11183.1489751322. The cubic root of 125062821 is about 500.0837473053.

The spelling of 125062821 in words is "one hundred twenty-five million, sixty-two thousand, eight hundred twenty-one".